Edits are not syncing across devices

Photo edits are not syncing across devices. Edits made on my PC on Lightroom CC do not appear on my IPAD app or my Pixel phone Android app. Large universal edits do often sync, such as changing a photo from colour to black and white, but selective edits using the gradient filter or brush does not appear at all. Is it simply a case of time? If so, I am having to wait for a long time!
On the plus side, it does seem to be an intermittent problem, sometimes photos do syncs smoothly.
I can see many other people are having similar problems. Do anyone have any Ideas? I hope someone from Adobe can give some feedback on this. It’s very disappointing after the launch of the new Lightroom CC that a fundamental part of the product does not work .